Overview

A testicle that doesn’t move down into its proper place in the scrotum before birth is called an undescended testicle. It’s also known as cryptorchidism (krip-TOR-kih-diz-um). Most often, it’s just one testicle that doesn’t descend into the scrotum, which is the bag of skin that hangs below the penis. But sometimes both testicles are affected.

An undescended testicle is more common in premature babies than it is in full-term infants. An undescended testicle often moves down on its own within a few months after the baby is born. If your baby has an undescended testicle that doesn’t correct itself, surgery can be done to move the testicle into the scrotum.

Symptoms

Not seeing or feeling a testicle in the scrotum is the main symptom of an undescended testicle.

Testicles form in an unborn baby’s lower belly. During the last few months of pregnancy, the testicles typically move down from the stomach area. They move through a tubelike passage in the groin, called the inguinal canal, and descend into the scrotum. With an undescended testicle, that process stops or is delayed.

When to see a doctor

An undescended testicle often is found during an exam done shortly after birth. If your baby has an undescended testicle, ask how often exams will need to be done. If the testicle hasn’t moved into the scrotum by 3 to 4 months of age, the condition likely won’t correct itself.

Treating an undescended testicle when your child is still a baby might lower the risk of health problems later in life. These include cancer of the testicles and not being able to get a partner pregnant, also called infertility.

Older boys — from infants to preteens — who have descended testicles at birth might appear to be missing a testicle later. This might be a symptom of:

• A retractile testicle, which moves back and forth between the scrotum and the groin. The testicle might be easily guided by hand into the scrotum during a physical exam. A retractile testicle is due to a muscle reflex in the scrotum.
• An ascending testicle, which has returned to the groin. The testicle can’t be easily guided by hand into the scrotum. Another name for this is an acquired undescended testicle.

Talk to your child’s doctor or other member of their care team if you notice any changes in your child’s genitals or if you have other concerns

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